Aviation-motor



.I. ZANALETTI.

AVIATION MOT-0R.

APPLICATION FILED NOV. 19. 1911.

Patented Dec. 2,1919.

1. rarer OFFICE.

J QSEPH ZAFI'ALETTI, OF CHICAGO, ILLINOIS.

AVIATION-MOTOR.

Specification of Letters Patent.

Patented Dec. 2 1919.

Application filed November 19, 1917. Serial No. 202,851.

To all whom it may concern Be it known that I, JOSEPH motors and particularly in internal combustion engines for use in aviation, andhas reference especially to the valveope'rating and actuating mechanism for such'engines.

The principal object of this invention is the provision of simplifiedmeans for eliminating the usual valve shaft. and connecting gears for operating oriactuating the valves and also the provision of a construction which is of extreme lightness and of maximum simplicity of construction and opera- 7 tion.

A further object of this invention isthe provision of a cam element on the crank shaft, this cam element having means for actuating the push rods for a part of its ro-,

tation, the push rods remaining in their neutral or non-actuated position during the I ferent elevatlons, for actuatlng the push remainder ofthe revolution of the cam element and also during the next succeeding revolution thereof.

Further objects of this invention include improvements in details of construction and arrangement, as will more fully hereinafter appear. 7

To the accomplishment of the foregoing and such other objects as may hereinafter appear, my invention consists in the construction, combination and arrangement of parts hereinafter described and sought to bedefined in the appended claim, reference being made to the accompanying drawing forming a part hereof and which shows, merely for the purpose of illustrative disclosure, a preferred embodiment of my invention, it being expressly understood however that various changes may be made in practice Within the scope of the claim, without digressing from my inventive idea.

In the drawings Figure 1 represents a view in side elevation of the operating mechanism for actuating the push rods and valves, together with a casing containing the mechanism.

Fig. 2 is a vertical transverse section taken substantially on line 22 of Fig. 1.

Fig. 3 is a side elevation of one of the ZANALETTI, a subject of the King of ltaly, and resident of;

rotary engine in which the crank case and the plurality of radiating cylinders. turn on the crank shaft, the latter remaining stationary, but it is expressly to be understood that it is readily adapted for use inconnection with motors of other types of construction.

The numeral designates crankshaft I of the motor, having the crank 2 towhich the-connecting rodsof-the cylinder are connected, as is well understood. Thiscrank shaft is stationary, and mounted for rotation thereon is the casing 3 of the forni shown, adapted to be secured to a suitable part of the motor casing, with which it 1'0 I tates.

Secured to this crank shaft 1 is the cam element 4, which as shown, is of. cylindrical form, and. provided with a plurality of tracks, partsflof which are arranged at difrods, as will presently be described. The

outer track I designate by the reference character-5, the innertrack being designated by the reference character 6. It is to be provide means whereby elements engaging. one of the tracks 5 may slip over to one of the tracks 6 and vice versa, this means talcing the form of the diamond shape cross over 8, the elongated points of which extend a considerable distance into the grooves 7 between the elongated points of the ends of the tracks 5 and 6, as clearly shown to the leftin Fig. 2.v In connection with these tracks 5, it is to be noted that they are provided with the cam portion 9, which is raised" a considerable distance above the normal level thereof and above the normal level of the track 6,. and also that these high cam surfaces on the two track members are located on opposite sides of the cam element, as clearly shown in Fig. 1. Not only that, but the cross over elements 8, between the respective pairs of tracks 5 and 6, are

ing and ea'chhas its end provided with the relatively Wide yoke or pronged bifurcation 11in which is mounted a pin'or shaftll Slidably mounted on this pin or shaft 12 is the cam engaging element 13, which ref erably takes the-form of a rollerfas'shoWn, and engages the top surfaces of the tracks and '6. "In-ordertoprevent this roller frombecoming disengaged from the tracks; 1' provide the side plates 14 "which are he'ld'to 'gether'by rivets I l and "are of greater length" than the radial widthof the roller and have their lower edges formed to loosely fit 'Within'the grooves 77. 1 The upper parts of these plates-are cut away at-15 so as to permit; an axial movement of'the roller 13 andplates 14 gonthe-sh'a'ft 12.

As stated before, the rollers- 13 engage the top surface of the tracks 5 and6, the side plates 14 fitting Within the grooves "As the casing'3 turns 'abont"the crank shaft v V 1, the rollers Will be guided into engagement with the high ca'rn'pait' of track- 5aiidthen by' means of the cross over into engagement With'the track 6 and aftercon'ipletely trav ersing the trac'k6 'Wlll begui'd'ed backagain v into the'loiv part of track""5 and subsequently onto the high campart thereof. It .is'durin'g its travel 'from' the low to the high part of track 5 that the "puslrro'd "is moved upwardly so a-s'to actuate its valve and'as the high part of naek 5 extendsrdr half the circumference oft-he cam-element it is seen that the valve is open for one halfof one revolutionand'that as'thef'loll'enbg These push- -rods are slidably mounted within the casnected to the push rod is in engagement with a lower surface durlng the remainder of that revolutlonrand also for the complete succeeding revolution, the valve remains closed, each valve being operated for a period of t1me correspondlng to a suitable part of revolution during each two revolutions of the casing about the crank shaft.

It is therefore seenthat I have provided a very simple construct-ion whereby the valve operating mechanism is operated directly from the crank shaft without the "use of gears or complicated structures of any kind. The construction is extremely light,

simple, readily adjusted and'will not get out of order; V 1

Having described myinvention, what I claimis: An internal combustion engine including in combination, a stationary crank shaft; a cam element secured thereto, said cam ele- 'ment being provided with a plurality of tracks, said tracksjbein-g arranged in pairs,

one of the tracks of 'eaclrpair having a radially raised portion for part of the air cunife'rence thereof, the remainder of said track andthe companiontrackbeing lower than said raisedportion and of substantially uniform level; grooves provided on each side of said track and cross over construe v tionsprovided between sa d tracks "in said cam elements; a casing "mounted forrotation relative tosaidc'rank shaft; push rod. or

elements slidably mounted in said casing rollers movably nounted on'the inner ends of sald push rod elementsand engaging said.

tracks, members associated with said rollers to fit said grooves wherebysaid-push rods are movedto one position for substantially half a-revolution of said casing and are moved to another position for substantially one and one-half revolutions of said casing.

r JQFZANALETTlI 

